CN212719710U

CN212719710U - Methanol liquid-gas conversion jet-combustion device

Info

Publication number: CN212719710U
Application number: CN202021157075.8U
Authority: CN
Inventors: 杨广会; 杨文圣; 赵帅; 杨文利; 李亚军
Original assignee: Chengde Clean Composite Fuel Plant
Current assignee: Chengde Clean Composite Fuel Plant
Priority date: 2020-06-19
Filing date: 2020-06-19
Publication date: 2021-03-16
Anticipated expiration: 2030-06-19

Abstract

The utility model provides a methanol liquid-gas conversion jet combustion device, which comprises a converter, a jet burner, a first air pump and a gas transmission system; the converter is internally provided with a conversion chamber, the conversion chamber is used for containing liquid methanol, an electric heating pipe and a flue gas pipeline are arranged in the conversion chamber and used for heating the liquid methanol, two ends of the flue gas pipeline respectively extend out of the conversion chamber, and the converter is also provided with a first gas collecting chamber communicated with the top of the conversion chamber; the burner is used for burning gaseous methanol and spraying flame to the outside of the burner; the burner is provided with a second gas collecting chamber for collecting high-temperature flue gas; the exhaust end of the first air pump is connected with one end of the flue gas pipeline, and the air suction end is communicated with the second air collection cavity through a high-temperature-resistant air pipe; one end of the gas transmission system is communicated with the first gas collection cavity, and the other end of the gas transmission system is connected with the burner and used for transmitting the gaseous methanol to the burner. The utility model provides a methanol liquid gas conversion spouts and fires device's liquid gas conversion power consumption is little, the running cost is low.

Description

Methanol liquid-gas conversion jet-combustion device

Technical Field

The utility model belongs to the technical field of the combustor, more specifically say, relate to a methyl alcohol liquid gas conversion spouts and fires device.

Background

At present, energy saving and environmental protection are as the major civil problem, receive people's concern more and more, to some places of fire, such as boiler, green house, kiln, because it is big to use the fire volume, in order to guarantee that the fuel burning is abundant, reduce gaseous emission of pollution, the combustor that has begun to extensively adopt at present burns and heats, but because the fuel of present commonly used still is coal, natural gas, diesel oil or non-renewable resources such as petrol, and these fuels can produce a certain amount of carbon dioxide, carbon monoxide, gaseous pollutants such as sulfur dioxide at the combustion process, consequently, the pressure to energy and environmental protection is still great.

In view of the above circumstances, a burner using gaseous methanol as fuel has been developed after being improved again, but since methanol is in a liquid state in a normal environment, it needs to be heated to sixty-five degrees centigrade or more to be gasified into gaseous methanol, and at present, a common way for gasifying methanol is to boil liquid methanol (usually, electrically heat), which has the problems of high power consumption and high operation cost.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a methanol liquid gas conversion spouts and fires device aims at solving the problem that the methanol gasification process power consumption of the combustor that adopts methanol fuel among the prior art is big, with high costs.

In order to achieve the above object, the utility model adopts the following technical scheme: the methanol liquid-gas conversion jet combustion device comprises a converter, a burner, a first gas pump and a gas transmission system; the converter is internally provided with a conversion chamber, the conversion chamber is used for containing liquid methanol, an electric heating pipe and a flue gas pipeline are arranged in the conversion chamber and used for heating the liquid methanol, two ends of the flue gas pipeline respectively extend out of the conversion chamber, and the converter is also provided with a first gas collecting chamber communicated with the top of the conversion chamber; the burner is used for burning gaseous methanol and spraying flame to the outside of the burner; the burner is provided with a second gas collecting chamber for collecting high-temperature flue gas; the exhaust end of the first air pump is connected with one end of the flue gas pipeline, and the air suction end is communicated with the second air collection cavity through a high-temperature-resistant air pipe; one end of the gas transmission system is communicated with the first gas collection cavity, and the other end of the gas transmission system is connected with the burner and used for transmitting the gaseous methanol to the burner.

As another embodiment of the present application, a burner includes a fan, a nozzle barrel, and a fuel pipe; one end of the spraying cylinder is connected with an air outlet of the fan, the other end of the spraying cylinder is provided with a combustion cylinder, and a second air collecting chamber is arranged in the combustion cylinder; the fuel pipe is arranged in the spray cylinder, one end of the fuel pipe is communicated with the gas transmission system, and the other end of the fuel pipe extends to the combustion cylinder along the axial direction of the spray cylinder.

As another embodiment of this application, the inside of a combustion section of thick bamboo is equipped with a high temperature resistant sieve section of thick bamboo, and the internal perisporium wall of a high temperature resistant sieve section of thick bamboo and a combustion section of thick bamboo encloses into second gas collection cavity jointly.

As another embodiment of this application, first gas collecting chamber is located the top of conversion cavity, and the roof of conversion cavity is equipped with first gas pocket, and first gas collecting chamber and first gas pocket intercommunication.

As another embodiment of the present application, the outer peripheral wall and the top wall of the first gas collecting chamber are coated with an insulating layer.

As another embodiment of the present application, the top wall of the conversion chamber is further provided with a second air hole, the wall of the first air collecting chamber is provided with a third air hole, the converter is internally provided with a second air pump, the air suction end of the second air pump is connected with the second air hole, and the air discharge end is connected with the third air hole.

As another embodiment of this application, first gas collecting chamber is equipped with the inlet channel with first gas port intercommunication, is equipped with the valve plate in the inlet channel, and the valve plate has the open mode of opening inlet channel, still has the closed mode of shutoff inlet channel.

As another embodiment of this application, the valve plate matches with inlet channel's cross sectional shape, and is equipped with the axostylus axostyle on the axis of valve plate, and the both ends of axostylus axostyle are connected with inlet channel's lateral wall rotation respectively, and wherein one end stretches out the outside of first air-collecting chamber, is equipped with the motor on the converter, and the output of motor is connected with the end that stretches out of axostylus axostyle.

As another embodiment of the present application, the air delivery system includes a third air pump and a second air delivery pipeline; the air suction end of the third air pump is communicated with the first air collecting cavity through a first air conveying pipeline, and the air exhaust end of the third air pump is connected with the burner through an air pipe; a first electromagnetic valve is arranged on the first gas transmission pipeline in series; a second electromagnetic valve is arranged on the second gas transmission pipeline in series, one end of the second electromagnetic valve is communicated with the first gas collection cavity, and the other end of the second electromagnetic valve is connected with the burner.

As another embodiment of the application, a fuel pump is further arranged in the converter, an outlet of the fuel pump is communicated with the conversion chamber, and an inlet of the fuel pump is used for being connected with a liquid outlet of the liquid methanol storage tank.

The utility model provides a methanol liquid gas conversion spouts and fires device's beneficial effect lies in: compared with the prior art, the utility model discloses methyl alcohol liquid gas conversion spouts and fires device, liquid methyl alcohol in the conversion cavity is heated after the electric heating pipe circular telegram, liquid methyl alcohol is heated boiling gasification, gaseous state methyl alcohol gets into first gas collecting cavity, then carry to the jet burner in through gas transmission system, spout behind the flame formation of the burning of lighting a fire in the jet burner, the high temperature flue gas that produces gets into second gas collecting cavity in the gaseous state methyl alcohol combustion process, then the high temperature flue gas gets into the flue gas pipeline under the twitch of first air pump, utilize the heat of high temperature flue gas transmission to flue gas pipeline to carry out the boosting to liquid methyl alcohol in the conversion cavity, can reduce electric heating pipe's consumption, reduce the heating gasification power consumption of liquid methyl alcohol, the running cost is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a methanol liquid-gas conversion jet combustion device according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

fig. 3 is a schematic structural diagram of a converter according to an embodiment of the present invention.

In the figure: 1. a converter; 10. a transfer chamber; 101. an electric heating tube; 102. a flue gas duct; 1020. a smoke dispersing cylinder; 103. a first air hole; 104. a second air hole; 11. a first gas collecting chamber; 110. an air intake passage; 111. A motor; 112. a shaft lever; 113. a valve plate; 114. a third air hole; 12. a heat-insulating layer; 13. a second air pump; 14. a fuel pump; 2. a burner; 20. a second gas collecting chamber; 201. a high temperature resistant screen cylinder; 21. a fan; 22. a spray cylinder; 23. a fuel tube; 24. a combustion can; 25. an igniter; 3. a first air pump; 4. a gas delivery system; 41. a third air pump; 42. a first gas transmission pipeline; 420. a first solenoid valve; 43. a second gas transmission pipeline; 430. a second solenoid valve; 5. a barometer; 6. an explosion-proof valve; 7. and (5) a liquid methanol storage tank.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It should be noted that the utility model provides a methanol liquid gas conversion spouts and fires device passes through control system control ignition and puts out a fire and other control operations, "electric heating pipe", "fan", "air pump", "fuel pump", "solenoid valve", "motor", "some firearm" that mention in the embodiment, all are connected with the control system electricity to control by control system, the control technique that relates is conventional technical means, no longer gives unnecessary details here.

Referring to fig. 1 to fig. 3, a methanol liquid-gas conversion jet-combustion device provided by the present invention will now be described. The methanol liquid-gas conversion jet combustion device comprises a converter 1, a burner 2, a first air pump 3 and a gas transmission system 4; the converter 1 is internally provided with a conversion chamber 10, the conversion chamber 10 is used for containing liquid methanol, an electric heating pipe 101 and a flue gas pipeline 102 are arranged in the conversion chamber 10 and used for heating the liquid methanol, two ends of the flue gas pipeline 102 respectively extend out of the conversion chamber 10, and the converter 1 is also provided with a first gas collecting chamber 11 communicated with the top of the conversion chamber 10; the burner 2 is used for burning gaseous methanol and spraying flame to the outside of the gaseous methanol; a second gas collecting cavity 20 for collecting high-temperature flue gas is arranged on the burner 2; the exhaust end of the first air pump 3 is connected with one end of the flue gas pipeline 102, and the air suction end is communicated with the second air collecting chamber 20 through a high-temperature resistant air pipe; one end of the gas transmission system 4 is communicated with the first gas collecting chamber 11, and the other end is connected with the burner 2, and is used for transmitting the gaseous methanol to the burner 2.

The utility model provides a methanol liquid gas conversion spouts combustion apparatus's theory of operation: because methanol is liquid at normal temperature, the electric heating pipe 101 is firstly started to heat the liquid methanol in the conversion chamber 10 before ignition, the liquid methanol starts to be gasified after boiling (the temperature is higher than 65 ℃) to form gaseous methanol, the air pressure in the conversion chamber 10 rises along with the increase of the density of the gaseous methanol in the conversion chamber 10 during continuous heating, so that the gaseous methanol enters the first air collecting chamber 11 with relatively low air pressure, then the gaseous methanol is conveyed to the burner 2 through the air conveying system 4 and is sprayed out after being combusted in the burner 2, high-temperature flue gas generated in the combustion process of the gaseous methanol enters the second air collecting chamber 20, the high-temperature flue gas enters the flue gas pipeline 102 from one end of the flue gas pipeline 102 through the first air pump 3 and is discharged to the outside from the other end of the flue gas pipeline 102 (in order to avoid direct injection of the flue gas, a smoke diffusing cylinder 1020 with full mesh on the peripheral wall can be arranged at the end to disperse the flue gas and discharge the, in the process that the high-temperature flue gas passes through the flue gas pipeline 102, the flue gas pipeline 102 is heated to perform auxiliary heating on the liquid methanol, and at the moment, the high-temperature flue gas continuously passes through the flue gas pipeline 102, so that the heating power of the electric heating pipe 101 can be reduced.

It should be noted that the arrangement of the flue gas duct 102 may be a serpentine curve arrangement or a spiral curve arrangement in the conversion chamber 10 according to the actual space of the conversion chamber 10, and on the premise of not interfering with the electric heating pipe 101, the larger the coverage of the conversion chamber 10 is, the better the heating effect is.

The utility model provides a methyl alcohol liquid gas conversion jet-combustion device, compared with the prior art, liquid methyl alcohol gets into first gas collecting cavity 11 after the boiling gasification that is heated in conversion cavity 10, carry to 2 internal combustion formation flames of burner and blowout through gas transmission system 4, the high temperature flue gas that produces among the gaseous state methyl alcohol combustion process gets into second gas collecting cavity 20, the high temperature flue gas gets into flue gas pipeline 102 under the twitch of first air pump 3, utilize the heat of high temperature flue gas transmission to flue gas pipeline 102 to carry out the boosting to the liquid methyl alcohol in the conversion cavity 10, can reduce electric heating pipe 101's consumption, reduce the heating gasification power consumption of liquid methyl alcohol, the running cost is reduced.

Referring to fig. 1 and 2, a burner 2 includes a blower 21, a nozzle 22 and a fuel pipe 23; wherein, one end of the spray cylinder 22 is connected with the air outlet of the fan 21, the other end is provided with a combustion cylinder 24, and the combustion cylinder 24 is internally provided with a second air-collecting chamber 20; the fuel pipe 23 is provided inside the nozzle casing 22, and has one end communicating with the gas supply system 4 and the other end extending to the combustion casing 24 in the axial direction of the nozzle casing 22.

The burner 2 is provided with a conventional igniter 25, and when the vaporized methanol is discharged from the fuel pipe 23, ignition and ignition are performed by the igniter 25. Open fan 21 after gaseous state methyl alcohol ignites and blow to spouting a section of thick bamboo 22 in, and then drive the outside blowout of flame of a section of thick bamboo 24, the high temperature flue gas that flame produced in a section of thick bamboo 24 gets into second gas collection chamber 20, and carry to flue gas pipeline 102 through first air pump 3 and heat the liquid methyl alcohol in the conversion chamber 10, be used for carrying out the auxiliary heating to liquid methyl alcohol through the collection to the high temperature flue gas, can reduce the heat power consumption of electric heating pipe 101, thereby reduce its power consumption, reduce running cost.

In the present embodiment, referring to fig. 2, a high temperature resistant screen cylinder 201 is disposed inside the combustion cylinder 24, and an outer peripheral wall of the high temperature resistant screen cylinder 201 and an inner peripheral wall of the combustion cylinder 24 jointly enclose a second gas collecting chamber 20. Because the second gas collecting cavity 20 is communicated with the gas suction end of the first gas pump 3, under the action of the first gas pump 3, negative pressure is formed in the second gas collecting cavity 20, the second gas collecting cavity 20 is an annular cavity, high-temperature flue gas enters the second gas collecting cavity 20 from the peripheral wall of the high-temperature resistant screen cylinder 201 through each screen hole on the high-temperature resistant screen cylinder 201, and then is discharged into the flue gas pipeline 102 under the pumping of the first gas pump 3, the high-temperature flue gas collection amount is large, the heating efficiency of liquid methanol is high, and the power consumption of the electric heating pipe 101 is reduced.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 3, the first air collecting chamber 11 is located above the converting chamber 10, the top wall of the converting chamber 10 is provided with a first air hole 103, and the bottom of the first air collecting chamber 11 is communicated with the first air hole 103. The gaseous state methyl alcohol rises through the lower first gas collecting cavity 11 of relative atmospheric pressure of first gas vent 103 discharge into behind the methyl alcohol gasification, through locating conversion cavity 10's top with first gas collecting cavity 11, on the one hand, can make the partial heat transfer of conversion cavity 10 to first gas collecting cavity 11, it is liquefied because of the temperature descends very fast when avoiding gaseous state methyl alcohol to pass through first gas collecting cavity 11, on the other hand can make things convenient for gaseous state methyl alcohol directly to rise and discharge first gas collecting cavity 11 (straight line circulation) through first gas vent 103, thereby improve the circulation speed of gaseous state methyl alcohol, ensure the air feed rate to burner 2.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 3, the peripheral wall and the top wall of the first air-collecting chamber 11 are wrapped with the heat-insulating layer 12. The heat transferred to the first gas collecting chamber 11 by the conversion chamber 10 is protected by the insulating layer 12, so that the condition that the internal temperature is too low due to the heat dissipation of the chamber wall of the first gas collecting chamber 11 is avoided, and the condition that gaseous methanol is liquefied due to the temperature reduction when passing through the first gas collecting chamber 11 is avoided.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 3, the top wall of the conversion chamber 10 is further provided with a second air hole 104, a third air hole 114 is provided on the wall of the first air-collecting chamber 11, a second air pump 13 is provided in the converter 1, an air suction end of the second air pump 13 is connected to the second air hole 104, and an air discharge end is connected to the third air hole 114. Along with the gasification process of methanol, the air pressure in the conversion chamber 10 rises, and the air pressure rises to improve the gasification temperature of the methanol (the air pressure rises, the boiling point of the liquid methanol rises), and the gaseous methanol generated in the conversion chamber is discharged into the first air collecting chamber 11 in time through the second air pump 13, so that the air pressure in the conversion chamber 10 is maintained in a low-pressure state, the heating and gasification of the methanol are facilitated, the power consumption of the electric heating pipe 101 is reduced, and the power consumption of the methanol gasification is reduced.

In the present embodiment, referring to fig. 3, an air intake passage 110 communicated with the first air hole 103 is disposed at the bottom of the first air collecting chamber 11, a valve plate 113 is disposed in the air intake passage 110, and the valve plate 113 has an open state for opening the air intake passage 110 and a closed state for closing the air intake passage 110. When second air pump 13 is in operation, valve plate 113 can be closed, thereby avoiding the phenomenon that gaseous state methanol flows backwards to conversion chamber 10 through inlet channel 110 after the air pressure in first air collecting chamber 11 is higher than conversion chamber 10, of course, when the first air pump is in operation, because the output of gasified methanol is less, second air pump 13 can be closed, valve plate 113 is opened, gaseous state methanol freely flows to first air collecting chamber 11, thereby reducing unnecessary power consumption (second air pump 13 is in operation power consumption), saving energy and reducing operation cost.

Specifically, a barometer 5 and an explosion-proof valve 6 are connected to the first gas collecting chamber 11, the pressure of the first gas collecting chamber 11 is detected in real time through the barometer 5, so that the generation amount of the gaseous methanol is known, if the pressure is low, the valve plate 113 is opened, the second air pump 13 is closed, if the pressure is high, the valve plate 113 is closed, the second air pump 13 is opened, if the pressure is too high, the explosion-proof valve 6 is opened and gives an alarm, at this time, the electric heating pipe 101 and the first air pump 3 should be closed in time, and the heating of the methanol is stopped, so that the operation safety is ensured; in addition, according to the air pressure value in the first air collecting chamber 11 obtained by the air pressure meter 5, the power of the electric heating tube 101 can be adjusted in real time, and on the premise of ensuring sufficient air supply, the low-power operation of the electric heating tube 101 is ensured, so that the power consumption is reduced, and the operation cost is saved.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 3, the valve plate 113 is matched with the cross-sectional shape of the air inlet channel 110, and the axle shaft 112 is disposed on the axle wire of the valve plate 113, two ends of the axle shaft 112 are respectively connected with the side wall of the air inlet channel 110 in a rotating manner, and one end of the axle shaft extends out of the first air collecting chamber 11, the converter 1 is disposed with the motor 111, and the output end of the motor 111 is connected with the extending end of the axle shaft 112.

When valve plate 113 is opened, motor 111 rotates to drive shaft rod 112 to rotate, and further drive valve plate 113 to rotate to a state that the plate surface of valve plate 113 is parallel to the axial direction of air inlet channel 110, and when valve plate 113 is closed, motor 111 rotates reversely to reset valve plate 113.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 and fig. 3, the gas transmission system 4 includes a third gas pump 41 and a second gas transmission pipeline 43; wherein, the air suction end of the third air pump 41 is communicated with the first air collecting chamber 11 through a first air transmission pipeline 42, and the air exhaust end is connected with the burner 2 through an air pipe; the first electromagnetic valve 420 is arranged on the first air transmission pipeline 42 in series; one end of the second gas transmission pipeline 43 is communicated with the first gas collecting chamber 11, and the other end is connected with the burner 2; the second electromagnetic valve 430 is connected in series to the second air pipe 43.

When the air pressure in the first air collecting chamber 11 is low, the third air pump 41 is opened, the first electromagnetic valve 420 is opened, the second electromagnetic valve 430 is closed, and the gaseous methanol is delivered to the burner 2 through the third air pump 41, so that sufficient air supply is ensured, when the air pressure in the first air collecting chamber 11 is high, the second electromagnetic valve 430 is opened, and the third air pump 41 and the first electromagnetic valve 420 are closed, so that the gaseous methanol is delivered to the burner 2 through the pressure difference effect, the power consumption of the third air pump 41 is reduced, and the operation cost is saved.

As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 and fig. 3, a fuel pump 14 is further disposed in the converter 1, an outlet of the fuel pump 14 is communicated with the conversion chamber 10, and an inlet is used for connecting a liquid outlet of the liquid methanol storage tank 7. Along with the gasification of the methanol, the liquid methanol in the conversion chamber 10 is reduced, and the liquid methanol is timely pumped from the liquid methanol storage tank 7 to the conversion chamber 10 through the fuel pump 14, so that the continuous supply of the liquid methanol is ensured, and the gasification efficiency is ensured.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. Methanol liquid-gas conversion jet-combustion device, its characterized in that includes:

the converter is provided with a conversion cavity, the conversion cavity is used for containing liquid methanol, an electric heating pipe and a flue gas pipeline are arranged in the conversion cavity and used for heating the liquid methanol, two ends of the flue gas pipeline respectively extend out of the conversion cavity, and the converter is also provided with a first gas collecting cavity communicated with the top of the conversion cavity;

a burner for burning gaseous methanol and spraying a flame to the outside thereof; the burner is provided with a second gas collecting chamber for collecting high-temperature flue gas;

the exhaust end of the first air pump is connected with one end of the flue gas pipeline, and the air suction end of the first air pump is communicated with the second air collection cavity through a high-temperature-resistant air pipe;

and one end of the gas transmission system is communicated with the first gas collection cavity, and the other end of the gas transmission system is connected with the burner and is used for transmitting the gaseous methanol to the burner.

2. The methanol liquid-gas shift burner apparatus of claim 1, wherein the burner comprises:

a fan;

one end of the spraying cylinder is connected with an air outlet of the fan, the other end of the spraying cylinder is provided with a combustion cylinder, and the second air collecting cavity is arranged in the combustion cylinder;

and the fuel pipe is arranged in the spray cylinder, one end of the fuel pipe is communicated with the gas transmission system, and the other end of the fuel pipe extends to the combustion cylinder along the axial direction of the spray cylinder.

3. The methanol liquid-gas shift injection combustion device according to claim 2, characterized in that: the inside of a combustion section of thick bamboo is equipped with a high temperature resistant sieve section of thick bamboo, the periphery wall of a high temperature resistant sieve section of thick bamboo with the internal perisporium of a combustion section of thick bamboo encloses jointly into second gas collection cavity.

4. The methanol liquid-gas shift injection combustion device according to claim 1, characterized in that: the first gas collecting cavity is located above the conversion cavity, a first air hole is formed in the top wall of the conversion cavity, and the bottom of the first gas collecting cavity is communicated with the first air hole.

5. The methanol liquid-gas shift injection combustion device according to claim 4, characterized in that: the periphery wall and the roof cladding of first air collecting cavity have the heat preservation.

6. The methanol liquid-gas shift injection combustion device according to claim 4, characterized in that: the top wall of the conversion chamber is also provided with a second air hole, the wall of the first air collecting chamber is provided with a third air hole, a second air pump is arranged in the converter, the air suction end of the second air pump is connected with the second air hole, and the air exhaust end of the second air pump is connected with the third air hole.

7. The methanol liquid-gas shift injection combustion device according to claim 6, characterized in that: the bottom of the first air collecting cavity is provided with an air inlet channel communicated with the first air hole, a valve plate is arranged in the air inlet channel, and the valve plate is in an opening state for opening the air inlet channel and is also in a closing state for plugging the air inlet channel.

8. The methanol liquid-gas shift injection combustion device according to claim 7, characterized in that: the valve plate with the cross sectional shape of inlet channel matches, just be equipped with the axostylus axostyle on the axis of valve plate, the both ends of axostylus axostyle respectively with inlet channel's lateral wall rotates and is connected, and wherein one end stretches out the outside of first air collecting chamber, be equipped with the motor on the converter, the output of motor with the end connection that stretches out of axostylus axostyle.

9. The methanol liquid-gas shift injection device of claim 7 wherein the gas delivery system comprises:

the air suction end of the third air pump is communicated with the first air collecting cavity through a first air conveying pipeline, and the air exhaust end of the third air pump is connected with the burner through an air pipe; a first electromagnetic valve is arranged on the first gas transmission pipeline in series;

one end of the second gas transmission pipeline is communicated with the first gas collection cavity, and the other end of the second gas transmission pipeline is connected with the burner; and a second electromagnetic valve is arranged on the second gas transmission pipeline in series.

10. The methanol liquid-gas shift injection combustion device according to any one of claims 1 to 9, characterized in that: the converter is also internally provided with a fuel pump, the outlet of the fuel pump is communicated with the conversion chamber, and the inlet of the fuel pump is used for being connected with the liquid outlet of the liquid methanol storage tank.